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| Brand | Bigdipper |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | pAir2000-EFF-D |
| Instrument Type | Portable |
| Detection Principles | Electrochemical, Metal Oxide Semiconductor (MOS), Photoionization Detector (PID), Non-Dispersive Infrared (NDIR), UV-Vis Spectrophotometry |
| Accuracy | ±1–2% of reading |
| Flow Rate | 0.1 L/min |
| Response Time (T90) | <3 minutes |
| Operating Temperature | −10 °C to +60 °C |
| Operating Humidity | 10–90% RH (non-condensing) |
| Power Supply | 12 V rechargeable battery |
| Dimensions | 400 × 300 × 200 mm |
| Weight | 4.5 kg |
| Sensor Resolution | 0.1% FS |
| Long-Term Stability | ±10% per year |
| Display | 4×16-character LCD |
| Communication Interfaces | RS232 / RS485 |
| Calibration Options | Single-point inert gas zeroing, dual-standard (DKA) calibration with certified reference gases or traceable surrogates |
| Cross-Interference Compensation | Neural network-based multi-gas interference correction algorithm |
| Brand | Bigdipper |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Product Type | Portable |
| Detection Principle | Multi-sensor Fusion (Electrochemical, PID, NDIR, Catalytic Combustion, Semiconductor, Metal Oxide) |
| Accuracy | ±1–2% of reading (typ.) |
| Flow Rate | 0.1 L/min |
| Response Time | <1 min (T90) |
| Operating Temperature | −10 °C to +60 °C |
| Operating Humidity | 10–90% RH (non-condensing) |
| Dimensions | 400 × 300 × 200 mm |
| Weight | 4.5 kg |
| Power Supply | Rechargeable 12 V battery |
| Sensor Channels | Configurable from 4 to 23 gas-specific sensors |
| Compliance | Designed per GB 14554–1993 “Emission Standard of Odorous Pollutants” |
| Data Interface | RS232 / RS485 |
| Calibration | Dual-standard (DKA) and single-point inert gas zeroing |
| Cross-interference Compensation | Neural network-based real-time correction algorithm |
| Brand | Bigdipper |
|---|---|
| Origin | Beijing, China |
| Manufacturer | Bigdipper Instruments Co., Ltd. |
| Model | pAir2000-EFF-A1 |
| Instrument Type | Portable |
| Detection Principle | Multi-sensor array (electrochemical, metal oxide semiconductor, photoionization detection/PID) |
| Accuracy | ±1% of reading |
| Response Time | < 10 ms |
| Operating Temperature | -10°C to 60°C |
| Operating Humidity | 10–90% RH (non-condensing) |
| Gas Measurement Range | NH₃ (0.5–200 ppm), H₂S (0.3–100 ppm), ODU (0–10,000, unitless) |
| Resolution | 0.01 ppm (NH₃, H₂S), 0.1% FS (full scale) |
| Long-term Stability | ±10% per year |
| Power Supply | 12 V rechargeable battery |
| Dimensions | 400 × 300 × 200 mm |
| Weight | 4.5 kg |
| Compliance | NY/T 388–1999 (China Agricultural Standard for Odor Concentration Determination) |
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